Technician just left and problem returned

Our TV froze about 3 days ago and we lost WiFi. The technician was just here. Everything was working when he left, but about a half hour later, the TV froze again. 

I was struggling to figure out how to reach a live person when I got a call from an Indian call center checking to see if the problem was resolved. I explained the situation and he was in the middle of apologizing when the call disconnected. He did not call back and dialing the number he used gives me a busy signal. 

I’m extremely frustrated. Not so much by the issue itself, but by the inability to actually connect with someone at Xfinity in real time.